KItA.Nh M. SI ISFACE. - ÏIIK UKSI Ll' (>K SELECÏING FLICILATING VAKIAÏIO-\S. 'i'25 



Uie highesl per cent, of protcin were selecled for slarling the " high-protein " 

 plol. In a like manner the twenly-four cars showing' the highest per cent of 

 oil were chosen for the " high-oil "" plot. Similarily the twelve ears having the 

 lowest prolein content and llie twelve ears having the lowest oil content 

 were selecled for starting the " low-protein "' and the" low oil " plots 

 respectively. In each case the plots were planted on the ear-lo-the-row 

 System. In tiic following year there were analyzed a nnmber of ears froni 

 each of the twenty-four rows, say of the high-protein plot, and froni thèse 

 cars the twenty-four showing the highest per cent of protein, regardless 

 of pedigree, were selected for plantingin the " high-protein '' plot the following 

 year. Similar methods were employed in the succeeding years and in the 

 other plots. The important point for considération hère is that in each year 

 those ears froni a given plot which showed llie greatest dexiaiioii in the 

 desired direction were chosen to continue that expcrimenl. Thus il was an 

 cxperimenl in selecting fluctuating variations. 



The success of the experiment in accomplisliing the desired rcsulls are 

 niost niarked. Thus starting with an average prolein content, in Ihe original 

 one hundred and sixty-lhree ears, of 10.112 per cent Ihey were ablc in ten years 

 lo increase the average per cent of prolein to li.'ili. On the other hand in the 

 low prolein plots the pcrcentage was reduced lo H.tii. Similar resulls were 

 accomplished with the high and low oil plots. The yearly fluctuations in the 

 différent plots are shown in tables I and 2 which are Iaken from tables t> and 

 6 of the Illinois bulletin No l'JS. 



10,5.5 

 10,55 

 0,80 

 9,Ô4 

 10,04 

 8,22 

 8,02 

 9,27 

 8,57 

 8,0i 



TAlîl.K 2. 



Arnaijr l'rr cm/, of Oil In llir C.nqis liiirnslct. 



189G i,70 



1897 -4,75 



1898 5,15 



1899 5,04 



1900 



1991 



1902 



1905 



1904 



1905 



1906 



